package Thread2;

import java.util.Scanner;

public class Demo20 {
    private volatile static int flag = 0;
    public static void main(String[] args) {
        Object locker = new Object();

        Thread t1 = new Thread(() -> {
            while (flag == 0){

            }

            System.out.println("t1 线程结束");
        });

        Thread t2 = new Thread(()->{
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入flag 的值: ");
            flag = scanner.nextInt();
        });

        t1.start();
        t2.start();
    }
}
